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Home >> Chevrolet >> 2001 >> Camaro Base, 2D Convertible, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Control System Self-Diagnostics - 5.7L) >> Diagnostic Tests >> DTC P0530: A/C Refrigerant Pressure Sensor Circuit >> Diagnostic Procedures

Diagnostic Procedures

WARNING: This page is about a different variant/trim than selected.
  1. If HVAC diagnostic system check was performed, go to next step. If HVAC diagnostic system check was not performed, go to HVAC DIAGNOSTIC SYSTEM CHECK  under DIAGNOSTIC SYSTEM CHECKS. After performing HVAC diagnostic system check, go to next step.
    NOTE: Ensure ambient air temperature is more than 38°F (3°C) before performing next step.
  2. Turn ignition off. Check that A/C compressor rotates freely. Start engine. Turn A/C system off. If A/C compressor does not operate, go to next step. If A/C compressor continues to operate, go to diagnostics for compressor clutch does not disengage in appropriate A/C-HEATER SYSTEMS article in AIR CONDITIONING & HEATING.
  3. Turn engine off. Turn ignition on. Using scan tool, monitor A/C HIGH SIDE PRESSURE parameter in ENGINE DATA 2 list. If A/C high side pressure is 0.09-4.90 volts, go to DIAGNOSTIC AIDS . If A/C high side pressure is not 0.09-4.90 volts, go to next step.
  4. Turn ignition off. Locate and disconnect A/C refrigerant pressure sensor connector. See Figure. Turn ignition on. Using scan tool, monitor A/C HIGH SIDE PRESSURE parameter. If A/C high side pressure is less than 0.09 volt, go to next step. If A/C high side pressure is more than 0.09 volt, go to step  11.
  5. Turn ignition off. Connect a 3-amp fused jumper wire between A/C refrigerant pressure sensor connector terminals "B" (Gray wire) and "C" (Red/Black wire). Turn ignition on. Monitor A/C HIGH SIDE PRESSURE parameter. If A/C high side pressure is more than 4.9 volts, go to next step. If A/C high side pressure is less than 4.9 volts, go to step  9.
  6. Disconnect fused jumper wire. Using DVOM, measure voltage between ground and A/C refrigerant pressure sensor terminal "B" (Gray wire). If voltage is less than 5.1 volts, go to next step. If voltage is more than 5.1 volts, go to step  8.
  7. Turn ignition off. Disconnect negative battery cable. Using DVOM, measure resistance between ground and A/C refrigerant pressure sensor terminal "A" (Black wire). If resistance is more than 5 ohms, go to step  11. If resistance is less than 5 ohms, go to step  13.
  8. Check for short to voltage in Gray wire between A/C refrigerant pressure sensor terminal "B" and PCM connector C1 terminal No. 45. See Figure. Repair as necessary. After repairs, go to step  17. If circuit is okay, go to step  14.
  9. Check for open, short to ground or high resistance in Gray wire between A/C refrigerant pressure sensor terminal "B" and PCM connector C1 terminal No. 45. See Figure. Repair as necessary. After repairs, go to step  17. If circuit is okay, go to next step.
  10. Check for open, short to ground or high resistance in Red/Black wire between A/C refrigerant pressure sensor terminal "C" and PCM connector C2 terminal No. 14. See Figure. Repair as necessary. After repairs, go to step  17. If circuit is okay, go to step  14.
  11. Check for short to voltage in Red/Black wire between A/C refrigerant pressure sensor terminal "C" and PCM connector C2 terminal No. 14. See Figure. Repair as necessary. After repairs, go to step  17. If circuit is okay, go to step  14.
  12. Check for open in Black wire between A/C refrigerant pressure sensor terminal "A" and PCM connector C1 terminal No. 60. See Figure. Repair as necessary. After repairs, go to step  17. If circuit is okay, go to step  14.
  13. Check for poor connections at A/C refrigerant pressure sensor connector. Repair as necessary. After repairs, go to step  17. If connections are okay, go to step  15.
  14. Check for poor connections at PCM connectors. Repair as necessary. After repairs, go to step  17. If connections are okay, go to step  16.
  15. Replace A/C refrigerant pressure sensor. See REMOVAL, OVERHAUL & INSTALLATION - CARS article. After repairs, go to step  17.
  16. Replace PCM. See REMOVAL, OVERHAUL & INSTALLATION - CARS article. After replacing PCM, go to next step.
  17. Using scan tool, clear DTCs. Turn ignition off for at least 30 seconds. Start engine and allow it to reach normal operating temperature. Operate vehicle within conditions for setting this DTC. If scan tool indicates that this test ran and passed, go to next step. If scan tool does not indicate that this test ran and passed, go to step  2.
  18. Using scan tool, select CAPTURE INFO, REVIEW INFO function. If any undiagnosed DTCs are displayed, go to applicable DTC test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no undiagnosed DTCs are displayed, system is okay.
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